Calculating attachment for type-writing machines.



A E. 0. WALTER. I CALCULATING ATTACHMENT FOE TYPEuWBITING MAGHINES.

APPLIOATIQN FILED JUNE 18, 1908;

Patented July 5,1910

16 SHBETBSHEET 1.

I IANVENTIORI E. a. WALTER. GALGULATING ATTACHMENT FOE TYPEAWRITING MACHINES.

' APPLIOATION PILE'I') JUNE 18, 1908.

- Patented July 5, 1910.

16 sums-$112111 2.

INVE

Hi5 ATTORNEYS.

E. G. WALTER. CALCULATING ATTACHMENT FOB. TYPEWRITIN-G MAOHINES.

APPLICATION FILED JUNE 18, 1908f I V Patented July 5,1910.

16 SEEETSSHEET 3.

TNVENTORI f/a/zw,

m5 ATTORNEYS.

E. GIWALTER.

CALCULATING ATTACHMENT FOR TYPEWRITING MACHINES.

WITNESSES.

E. G. WALTER. @OALGULATING ATTACHMENT FOR TYPBWRITING'MAGHINES,

APPLICATION FILED JUNE 1a, 1908.

' Patented July 5,1910.

18 SHEETS-SHEET 5.

E: 0. WALTER.

'GALGULATING ATTACHMENT FOR TY'PLWBITING MACHINES. 1 1 Arrmomron FILED JUNE 18, 1908.

Patented July 5,1910.

,. WITNESSES:

B. G. WALTER. GALGULATING ATTACHMENT FOR TYPE-,WRITING MACHINES.

APPLIOATION IILED JUNE 1%, 1908.

Patented July 5, 1910.

Y lNVENT OR:

I WITNESSEVSFY Mifiawwi E. c. WALTER. CALCULATING ATTACHMENT FOB TYPRWRITING MAGHINE8.

APPLICATION nub mm: 1a, 1908.

Patented Jul 5, 1910. I 16 SHEETS-SHEET a,v

, '3. o. WALTER. CALCULATING ATTAGHMENT FOR TYPEAWBITING MACHINES.

APPLIUATION FILED 111K318, 1-908.

PatentedJuly 5, 1910.

INVENTOR B.- c. WALTER. I GAIJGULA'TIING ATTACHMENT FOB. TYPHWRITING MACHINES. '-963,'727.

APPLICATION FILE"): mums, 190s.

I PatentedJuly 5, 1910. w v k 16 SHEETS-SHEET 10.

' WITNESSES 12,0. WALTER. UAQGULATING ATTACHMENT FOB. T YPRWRITING MACHINES.

1s gums-sum 11.

APPILIOATIOH FILED JUNE 18, 1908. 79635727. v Patented July 5, 1910.

WITNESSES: v INVENTORLIH 1 YMM HIISJATTORNEYS,

, E. c. WALTER. I CALCULATING ATTACHMENT'FORTYPRWRITING MAGHINES.

APPLICATION IILED JUNE 1s,1'9oa.

1e snn ntrs snnn'r 1a.

' INVENTOR:

m ATTORNEYS,

- 'Patefited July 5,1910.

WITNESSVEVS:Q 1.. I

} v f E. 0. WALTER. v GALGULATING ATTACHMENT FOB. TYPHWRITING MAGHINES.

IIIIIIIIIIIII LE DDDDDDD ,1'908, I

' Patented July 5, 1910.

SSSSSSSSSSSSS T 13.

B. 0. WALTER. GALGULATING ATTACHMENT FOR TYBEJWRITING MACHINES.

APPLIOATION FILED JUNE-1B, 1908.

Patented July 5, 1910.

16 SHEETS-SHEET 14.

WITNESSES:

- I INVENTOR:

@- HIS B. C. WALTER.

GALGULATING ATTACHMENT FOR TYPEAWRITING MACHINES.

APPLIOATION I'ILLD' JUNE 18,1908.

Patented July 5,1910.

16 SHEETS-SHEET '15.

WITNESSES:

' I 1 H LS ATTORNEY5,7/

E. .0. WALTER. Y

GALGULATING ATTACHMENT FOR TYPE, WRITING MACHINES. I

' APPLICATION FILED JUNE 1a, 1908.

Patented Jul 5, 1910.

16 SHEETS-SHEET 16.

UNITED STATES PATENT orrion EDWARD C. WALTER, OF NEW YORK, N. Y., ASSIGNOR TO HARRY T. AMBROSE, OF

ORANGE, NEW JERSEY.

CALCULATING ATTACHMENT FOR TYPE-WRITING MACHINES.

I Specification of Letters Patent. 5 Patented July 5, 1910.

Application filed June 18, 1908'. Serial 439,197.

To all whom it may concern: Be it known that I, EDWARD G. WALTER, a

citizen of the United States, residing at New clear, and exact description of the invention, such as Wlll enable'others skilled in the art to which it appertams to make and use the same.

My invention relates to calculating-attachm ents for typ ewvriting-inachines, and has for its object to provide a device of this character which can be easily adjusted to proper position and quickly and simply operated.

It is the purpose of my invention to construct a calculating-machine which may be secured to a portion of the typewriter structure, so that the typewriter-keys, upon their depression, will cause the positioning of the actuating-elements of the calculator, the final operation of such actuating-elements, to effect a computation, being accomplished by some means independent of vthe keys, and of the typewriter, itself, such as a hand lever, for instance. I,

A further object consists in the novel means employed for obtaining a differential movement of the plunger-operated means for the keys of various denominations, to-

gether with the devices used to prevent too great movement of said means and of the particular denominational element operated thereby. I

vAn additional purpose to be attained is that resulting from the improved form of calculator which I employ, the same embodying certain neiv'instrumentalities for resetting any one or more of the denominational actiiatmg-mclnbers 111 case of a nustake, and for setting all the number-wheels to zero-position.

Another object of the invention is the ,provision of an accumulator, preferably forming a part of the computer, and im-- proved means for operating the same.

Other objects and advantages will be ap-- parent after considering theinvention, as set forth inthe following description, and fully defined in the appended claims.

My invention, more specifically, comprehends an attachment of the class designated 7 which may be positioned on the 'lmesspacmg- .the printing-ltey and a different degree of carriage of a flat-platenmachine,- a part of the selecting-mechanism therefor bein carried by the letter-Spacing-earriage o the machine; and it is .to be understood that when I employ the terms calculating machine or calculator, I refer to and intend to include such machines as come under the various titles of adding-machine, register, computer, computing meclninism, calculator, accumulator, totalizer, and the like.

An important characteristic of my machine, and a novelty in the style of typewriters to which my improved computer is particularly applicable, is that the labor of operating the calculating-mechanism I to effect a computation is entirely taken off the printing (numeral) keys: In flat-platen machines employing computers, as now being marketed, the printing-key, itself and by' itself, is made not only to position the parts of the calculator, but, also, to actuate said parts to turn the dei'iominationalmem- I bers or digit-wheels to effect a computation,

thus entailin a great an ountiof strain on work for each key accord ng to'whether it is effecting a movement of a. single digitwhcel or a plurality thereof, causing weakening and loosening of the parts, and a heavy and over-taxing burden upon the operator, and, likewise, decreasing the speed of the machine and, consequently, the use fulness thereof) or, if (to overcome this) the carriage-spring is increased, this further increases the burden upon the operator: As contrzulistinguished from these strife tures, the printing-key, in my mechamsm,

simply operates the seleetirig-mechanism to bring certain instrumentalities in thcronyl puter into position with reference to independent operat-iug parts also in the computer, and, then, movementof the denominational-whcels of the calculator (to effect a computation) is accomplished by moving an independent actuating-means, such as a hand-lever.

In the accompanying drawings, I have illustrated a preferred and one of many conccivable embodiments of my invraition, it being understood that other embodiments 105 thereof may be utilized and be within the spirit of my invention.

l igui'e-lis a perspective view of a usual form" of -fiat-platen-typewriter e nipped with my improved ealculating-attacimeatg 11o is a top plan view of the lower part of the calculator with its supporting-bar, showing the means' for eifecting a slight adjustment of said bar for proper relation to the let.- ter-space-carriage-rack and scale; showing, also, the top of the letter-space-c'arriage; showing, also, the part of the selectingmechanism which is supported on said top;

,and, showing, also, underlying typewriterkeys, and the levers connecting them with saidpart of the selecting-mechanism; Fig. V-is a perspective View of'the top of the letter-spacing-carriage carrying part of the selecting-mechanism, and showing key-lever connections in detail, and the plunger of the selecting-mechanism; Fig. VIis an aggrouped I detail view of the several turnbuckles of the key-lever connections, show-.

ing the diiferent lengths of slots in said turnbuckles, which, themselves, appear of different relative lengths; Fig. VIIisa detailview, in perspective, of the slide and the plunger carried thereby, forming a part of the selectinganechanism. Fig. VIII-is a detail view, in perspective, of a modified form of means for limiting the movement ofthe plunger; Fig. IX-is a side elevation showing the application of my improvement to a round-platen machine; Figs. IX, IX

and I X areviews in elevation, and detail, showing a modification of the structurejof ig'. IX; Fig. X-is a side elevation of the parts of the calculator; Fig. XIis a view showingone of the number-wlreel-operatinggears, in front and rear elevation, and, in vertical section, disclosing the position of the ratchet-teeth, and cams for operating the carrying-mechanism; Fig. XII-is a perspective view showing the relative pos1- ions of two adjacent number-wheelopcrating gears, and the mechanism for carrying from one to the other, the part of one gear being broken away; Fig. XlII is a detail perspective view of a portion of Fig. XII, showing the position of the parts after the carrying operation, but before the carrying-stml'o't' the carrying-lever has ridden hit its eamon the number-wheel-operatiug-gear; Fig. XIV-is a detail perspective view :01? the number-wheel-operating-cams, constituting a part of the independent operatlng-deviceiof the computer, and showing the spirally-arranged projections for effect-- ing a movement of the parts for carrying successively a unit from one wheel to. an-

. other. Fig. XVis a perspectiveview of two adjacent numberwheel-operating-gears,-

in their entirety; also the parts ,for carrying a unit from one wheel to the other, the d1s tance between the several elements being exaggerated in this view to bring out the relation more clearly; Fig. XVI-is a detail view inside elevation of a portion of a number-wheel-operating-gear, showing, diagrammatically, the position of. the cams thereon with relation to the carrying-stud on the cooperating carrying-lever, (shown in dotted lines) Fig. XVIIis a side elevation of the selecting -'mechanism, and showing, also, the resetting-means (or nonproducer) for returning a part of the selecting-mechanism to normal position without effecting movement of the'denominational-members, and showing, also, the

' means (that is, the zero-producer) for resetting the denominational-members to zero-position; Fig. XVIII-is a perspective view of the parts, showing the zero-producer in operation; and showing, also, the

means for'locking the number-wheel-operating-gear and, also, devices for releasing such I locking-means previous to the operation of the zeroproducer; Figs. XVIII and XVIII are views in side elevation and detail of a selection-indicating-device; Fig.

XIX-is a perspective'view of the calcu-.

lator, of the accumulator carried thereby, and of the operating instrumentalities therebetween; Figs. XX, XXI, and XXII are detail views of portions of the accumulator;

Fig. XXIII-is a View in plan of the flatplaten, and the printing mechanism disposed thereover, and showing a plurality of computers disposed in relation to the column ofa work-sheet; and Fig. XXIV-is a diagrarmnatic view, showing a plurality of computers with their individual accumu lators attached, and a plurality of worksheets having a plurality of columns of different headings etc.). Referring more specifically to the draw-. in'gs, wherein like reference-characters refer to corresponding parts:- 1 designates the platen of the ordinary flat-platen typewriter as embodied in the Donningmachine, which 1s here shown for convenlence. of illustratlon of the present invent on.

(such as dollars, weights,

ing-carriage, mounted to travel upon the aforementioned track-rails.

Mounted to travel horizontally on the line spacing-carriage 3 is'the .letter-spacing-carriage 4, WlllCll 1's prov1ded=w1th the usual printing-keys, spacing-levers, tabulator, and

other devices commonly employed oua fla'tplaten machine.

The calculator is preferably, mounted ad- I 231110 the track-rails, and 3 the line-spacjustably on the rear rail of the line-spacing-carriage, and on the shaft 6, whichvlatter is provided with the horizontally -,arranged rack-teeth, as shown clearly in Figs. II and XIX.

As shown in Fig. IV, the shaft 6 is pro-L operate with the teeth on the shaft 6 and securely maintain the calculator in any predetermined position relative to thecarriage and its spacing. 8 is an indicator preferably carried by the calculator and alining with the scale 9 on the typewriter-frame,

thus enabling the determining of the exact' position of the calculator-attachment with respect to the column of the work-sheet, as well as forming a means for locating the carriage at any denominational position in that column.

A designates upon the platen to receive the desired tabulated matter. Also supported on the platen,

and preferably at one side thereof, is. a tallysheet 13 which may be employed to keep a memoranda of each individual bill, so that the number and amount of, bills 'sent out during the day, or other'period, may be determined at'a glance. If it is desired to register the numbers which are being printed at a certain portion of the billing-sheet, or other writing-surface, the calculator is moved along the shaft 6 until the indicator 8is at the proper position relative to the typewriter-scale 9, after which the latch 7 is dropped into the proper notch and the calculator is firmly positioned for'operation.

Selecting-Mechanism.

(1.) Actuatiizg-mechamsm between printing keys and the seZe0t07=.- -The calculator includes a series of selectors or selecting-levers 10, which are arranged to be successively engaged by a plunger 11 on each stroke of "a numeral-key as the carriage travels laterally across the printing-surface. The plunger 11,

is carried by the carriage 4; and therefore I will now proceed to describe the manner in whlch a different al movement is imparted.

to the plunger upon the depression of any of the numeraLkcys of different degrees, (as shown in'Figs. III, IV, V, VI, VII, VIII and X), whgrebya differential movement of the; selecting-element's of the' cal'culator is efi'ted: Journaled suitablebrackets on a billing-sheet positioned.

crank-structu're, the arm '23 of which has an elongated. slot at its lower end. The arm 23 has its lower end loosely connected in a bifurcated portion of the slide 24, the slot in said arm allowing a swinging movement of the arm 23 and a straight movement of slide 24. p f

The'plunger 11 is preferably pivoted to swing laterally in one direction only upon the slide 24, and is held against movement in the other direction by a pin 25, a suitable spring 26 maintainingit against the pin. This permits movement of th'efplunger' 11 in a direction opposite to that of the normal movement of the carriage, so that should the escapement mechanism operate to move the carriage before the plunger has been fully I returned to proper position, the plunger will yield when it strikes one of the levers 10, and therefore permit free movement of the'carriage without binding, and without breaking or bending of the parts. By omitting the pin 25, and providing a spring similar to spring 26 in place of the pin, the plunger may have a yieldable movement in either direction, in case it is desired to obviate any chance of theplunger striking the levers forcibly, upon the return movement of the carriage.

Fixed upon the plunger-operating-shafts4 12, 12, are arms 27, and, adjacent each fixed arm, is a loosely-mounted arm 28, carrying a pin 29 for engagement with the end of the corresponding fixed arms. Pivotall mounted at the outer end of each arm 28, 1s a turn buckle 30, having a slot 31 in its lower por-' 32, adapted to engage the abutment 33 and limit the downward movement of the turnbuckle.- Each key-lever-is provided with a pin or. suitable projection 34, engaging in the slot of its respective turn buckle and serving to depress the same wheneverthe key is operated. There are as many turn-buckles as there are numeral-keys, namely nine, and theslots are all of different lengths, that for number nine being the shortest, that for number one being the longest, and the others varying regularly and successively between these limits. "The slot for number one l'reylever being very'long, the keylever moves down a considerable distance be fore its plniengages the bottom of the slot,

and thus the extent of movement of the turn-buckle is comparatively slight; whereas, in the case of number nine key-lever,- the slot being short, there is very little lostmotion and a corresponding increase in the extent of movement of the turn-buckle. The movement of the turn-buckles being communicated through arms 28 and 27, plungeroperating-shaft 12, arm 1 link 16, arm 18, sleeve 20, arm 23, and slide 24, to plunger 11, it will be seen that the extent of movement of plunger 11 is in exact correspondence with the numeral being printedz Inasmuch as the plunger 11 is the means for moving each of the selecting-levers 10 to position the part of the selecting-device in the calculator for engagement and actuation by an independent operatin'gmechanism (presently to be described) for actuating the denominational-wheels of the calculator, to produce a computation the difi'erent levers 10 will be moved greater and lesser distances,

respectively, and the selectingedevices'be positioned accordingly, to. be moved then, by said independent operating-mechanism to effect movement of the number-wheels, one increment for number one two increments for number two, and so on up to nine, as will all be more fully disclosed hereinafter.

36 designatesan extension on the usual ribbon-guide-drive-link 13,,or any other constantlyeoscillatin-g part of the machine, which is thrown up upon each actuation of a key-lever to engage a preferably springeontrolled latch 37 pivoted in slide 24 (see Figs. X'and XVII). The latch' 37 when moved enga es behind the front end of lever 10, and loc fis the same to move with the plunger 11,- thus preventin inaccurate or too great'movement of the selecting-levers 10 which set the actuating-devices in the calculater. It is to be understood, of course, that this locking-catch, moves along as the carriage travels across the printing-surface, and acts in. the same manner, successively, on each different selecting-lever 10 after each spacing-movement takes place. I

Pivotally mounted'on the other end of the ribbon guide drive link, or other suitable part, is a lover 38 having a forward project ing' 11111.39 at the top, the lower edge thereof being provided with a plurality of ratchet-teeth (Figs. V, X, and XVII). Cooperating with. the aforementioned ratchet-teeth, isa pin- 40 having an angular. upper edge, on the side of the slide 24, which is arrangedfto be engaged by one of the teeth, according to the denominational se-, lection taking place, .to prevent excessive forward movement ofthe entireselecting mechanism. The

parts are so positioned and related that uponthedownward move. ment of arm 39, for numeral-key one, the pin 40 will be held b the first tooth, and for numeral-key two by the second tooth,

and soon. -As the action of the ribbonguide-drive-link 13 is always thesanie, the

lever 38 and arm 39 willalways have the same movement, insuring accurate stopping,

of the movement of the selecting-meehanlsm at the proper point to accord with the numeralbeing selected. Although the movement of arm 39 is always the same, it must be remembered that in the same time that it comes down to engaginp position, the plunger 11 passes through variable paths for different keys, namely, a distance of one incrcment for key number one two increments for key number two, and so on, this differential movement of the plunger being 'ef;

fected by the -mechanism previously described. It will be noted that there are only eight teeth on the rack face of the arm; 39,

for .the reason that nothing is needed to prevent excessive'movement when key number nine is depressed,for this should properly actuate all the partsto the limit of their movement. This lock is employed pri-'. marily for rapidwriting, suchbeing the i only time that there is a tendency toward too great movement: When writing at ordinary speed, the selecting me hanism will shown in a detail view in Fig. VIII, which I will now explain: As stated before, each loose arm 28, m 1ts downward movement, engages an arm 27 by means of the pin 29,

and the arm 27 being fixed on the shaft, the

movement of the'arm 28 is connnunicated to the'shaft and other elements in the suceeedmg operations.

which is shown 'in normal position in Fig. VIII where the hori7lontal arm of the catch is in engagement with a stationary abutment 343* on a pro ection on the top of the letter-' space-carriage. There is one of theseabutments 34 or each catch, but such abutmeni's are arranged in pairs, the abutments for each two adjacent catches being carried cured; to the'top oft-he carriage, as before stated. The downward extending arm of the catch is provided at the bottom with a nose 35, which is arranged to engage under lfyoted at the outer end of arm 28 is a right-angled cat h 36% 115. by and integral with an arm which is searm 28 commences its movement, the horizontally-extendin harm of the catch'is' care riedaw'ay fromt e stationaryabutment34',

and a suitablespring 86 throwsthe catch upa ward on its pivot, causing the nose 35t0 engage under the arm 27,an 1 hence (the? fixed arm 27 can move no'farther'than the.

loosely-mounted arm 28, the movement. of

the end of the arm 27 and lock it witli arm; 1 -28 as it moves downward. As scenes the 

